Тема: TDA7442
ИМС TDA7442 представляет собой регулятор тембра и громкости с микроконтроллерным управлением.
Основные характеристики аудиопроцессора TDA7442:
Напряжение питания от 7 до 10.2 В (9 В — рекомендуемое)
Максимальная амплитуда входного сигнала 2 Vrms
Коэффициент гармоник на частоте 1 кГц и входном сигнале 1 Vrms не более 0,01%
Отношение сигнал/шум 106 дБ
Разделение каналов 90 дБ
Диапазон регулировки тембра ВЧ и НЧ ± 14 дБ
Диапазон регулировки громкости от -79 до 0 дБ
Электронный коммутатор входов (4 стерео входа)
TDA7442.h
#ifndef TDA7442_H
#define TDA7442_H
#define TDA7442_address 0x40
//Sub addresses
#define TDA7442_INPUT_ATT 0b00000000
#define TDA7442_SURR_OUT_EFF 0b00000001
#define TDA7442_REZ 0b00000010
#define TDA7442_BASS 0b00000011
#define TDA7442_TREBLE 0b00000100
#define TDA7442_ATT_L 0b00000101
#define TDA7442_ATT_R 0b00000110
#define TDA7442_INPUT_MULT 0b00001001
#include <Arduino.h>
class TDA7442
{
public:
TDA7442();
void setInput_att(int in_att); // int -63...0 = -31.5...0 dB step 0.5 dB
void setSurr_sel(int surr, int out, int effect);/* int 0...2, int 0...1, int 0...15:
SIMULATED STEREO | MUSIC | OFF
VAR | FIX
EFFECT CONTROL -6...-21 dB */
void setRez(int rez); // int 0...3 = 12, 14, 18, 37 kOm
void setBass(int bass); // int -7...7 = -14...+14 dB step 2 dB
void setTreble(int treb); // int -7...7 = -14...+14 dB step 2 dB
void setVol_L(int vol_l); // int -79...0 = -79...0 dB
void setVol_R(int vol_r); // int -79...0 = -79...0 dB
void setInput(int in); // int 1...4
private:
void writeWire(char a, char b);
};
#endif //TDA7442TDA7442.cpp
#include <Arduino.h>
#include <Wire.h>
#include "TDA7442.h"
TDA7442::TDA7442(){
Wire.begin();
}
void TDA7442::setInput_att(int in_att){
in_att = 0b01000000 + abs(in_att);
writeWire(TDA7442_INPUT_ATT, in_att);
}
void TDA7442::setSurr_sel(int surr, int out, int effect){
switch(surr){
case 0: surr = 0b00000000;break;
case 1: surr = 0b00000001;break;
case 2: surr = 0b00000010;break;
}
switch(out){
case 0: out = 0b00000000;break;
case 1: out = 0b00000100;break;
}
switch(effect){
case 0: effect = 0b00000000;break;
case 1: effect = 0b00001000;break;
case 2: effect = 0b00010000;break;
case 3: effect = 0b00011000;break;
case 4: effect = 0b00100000;break;
case 5: effect = 0b00101000;break;
case 6: effect = 0b00110000;break;
case 7: effect = 0b00111000;break;
case 8: effect = 0b01000000;break;
case 9: effect = 0b01001000;break;
case 10: effect = 0b01010000;break;
case 11: effect = 0b01011000;break;
case 12: effect = 0b01100000;break;
case 13: effect = 0b01101000;break;
case 14: effect = 0b01110000;break;
case 15: effect = 0b01111000;break;
}
int sum = surr + out + effect;
writeWire(TDA7442_SURR_OUT_EFF, sum);
}
void TDA7442::setRez(int rez){
switch(rez){
case 0: rez = 0b00000000;break;
case 1: rez = 0b00000001;break;
case 2: rez = 0b00000010;break;
case 3: rez = 0b00000011;break;
}
writeWire(TDA7442_REZ, rez);
}
void TDA7442::setBass(int bass){
switch(bass){
case -7: bass = 0b00010000;break;
case -6: bass = 0b00010001;break;
case -5: bass = 0b00010010;break;
case -4: bass = 0b00010011;break;
case -3: bass = 0b00010100;break;
case -2: bass = 0b00010101;break;
case -1: bass = 0b00010110;break;
case 0: bass = 0b00011111;break;
case 1: bass = 0b00011110;break;
case 2: bass = 0b00011101;break;
case 3: bass = 0b00011100;break;
case 4: bass = 0b00011011;break;
case 5: bass = 0b00011010;break;
case 6: bass = 0b00011001;break;
case 7: bass = 0b00011000;break;
}
writeWire(TDA7442_BASS, bass);
}
void TDA7442::setTreble(int treb){
switch(treb){
case -7: treb = 0b00001110;break;
case -6: treb = 0b00011110;break;
case -5: treb = 0b00101110;break;
case -4: treb = 0b00111110;break;
case -3: treb = 0b01001110;break;
case -2: treb = 0b01011110;break;
case -1: treb = 0b01101110;break;
case 0: treb = 0b11111110;break;
case 1: treb = 0b11101110;break;
case 2: treb = 0b11011110;break;
case 3: treb = 0b11001110;break;
case 4: treb = 0b10111110;break;
case 5: treb = 0b10101110;break;
case 6: treb = 0b10011110;break;
case 7: treb = 0b10001110;break;
}
writeWire(TDA7442_TREBLE, treb);
}
void TDA7442::setVol_L(int vol_l){
writeWire(TDA7442_ATT_L, abs(vol_l));
}
void TDA7442::setVol_R(int vol_r){
writeWire(TDA7442_ATT_R, abs(vol_r));
}
void TDA7442::setInput(int in){
switch(in){
case 2: in = 0b00000000;break;
case 3: in = 0b00000010;break;
case 4: in = 0b00000100;break;
case 1: in = 0b00000110;break;
}
writeWire(TDA7442_INPUT_MULT, in);
}
void TDA7442::writeWire(char a, char b){
Wire.beginTransmission(TDA7442_address);
Wire.write (a);
Wire.write (b);
Wire.endTransmission();
}